12547855 has 4 divisors (see below), whose sum is σ = 15057432. Its totient is φ = 10038280.

The previous prime is 12547841. The next prime is 12547861. The reversal of 12547855 is 55874521.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12547855 - 2¹³ = 12539663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254781 + ... + 1254790.

It is an arithmetic number, because the mean of its divisors is an integer number (3764358).

Almost surely, 2^12547855 is an apocalyptic number.

12547855 is a deficient number, since it is larger than the sum of its proper divisors (2509577).

12547855 is an equidigital number, since it uses as much as digits as its factorization.

12547855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509576.

The product of its digits is 56000, while the sum is 37.

The square root of 12547855 is about 3542.2951599210. The cubic root of 12547855 is about 232.3752288488.

The spelling of 12547855 in words is "twelve million, five hundred forty-seven thousand, eight hundred fifty-five".